We Repair Arsilicii (pronounced something like AR SIL E CHEE) AL110, AL120, AL310, AL320, AL-BK20 and AL-C20  chargers.


 

"Hello Allan, once again thanks for everything you have done. It is great that the pump now works off its proper switch and I can now see the fresh water tank levels when filling up. 
Having a working mains charger and all the other things you fixed has transformed the vehicle. 
Its been a real pleasure working with you. 
Yours Thankfully Tom".



These units are well made and sophisticated, but they are not designed to support a battery past it's best and/or an enlarged battery bank.

If you have a battery bank larger than that recommended by the manufacturer, both the Battery bank and the Charger life will be shortened for two reasons.

The first is because the AL110 and AL310 (both low power 10amp mains 230v chargers) will support a habitation battery bank no greater than about 90Ah. Remember that the units like the AL320 charges BOTH the Habitation battery and the Starter Battery so it already has a combined battery bank of around 180Ah. Adding a second big habitation battery will often result in the batteries not getting up to full charge once the batteries have aged. 


Secondly the unit controls all charge to the habitation battery whether from Solar (inbuilt Solar reg), Alternator or mains charger. If a second, big, battery is fitted this increases the current through the unit from the Alternator, which the Spade connector type of plugs struggle to handle, resulting in a burnt front connector and PCB. 

See the photo below showing a badly burnt White Habitation battery connector and Red Starter battery connector just starting to fail. This unit only had a single habitation battery fitted, but the battery was poor.



Two big 100Ah batteries + the Fridge 12v power can draw upto 40amps from the Alternator, all of which goes in through the bottom left Red socket. 

This current is then split, the Fridge 14amps going out the Green Socket to the Fridge and the Habitation charge going out through the habitation White socket.

 


Excess current may also be passed through the unit if the Habitation battery is allowed to become poor, as the Alternator can be working harder for longer, so again over powering the front connectors. The damage shown in the photo above is becoming more common and it isn't just the connectors that are burnt, but the circuit board behind. Usually rendering the unit scrap.

The later 20amp units have uprated RAST5 front connectors which will take a little more current, but the practical restriction is still no more than a 160Ah TOTAL battery bank, which remember includes the Starter battery which it also looks after. We would suggest a habitation battery bank of 140Ah is the practical limit for the later chargers and 90Ah for the early AL320's and all the AL310's.




The AL120 restrictions are as per the AL320.

If you upgrade from an old unit to a late unit, the connector plugs will also require upgrading. 




SOLAR.

The AL310/AL320 all have an inbuilt Solar regulator that will handle a 100watt Solar Panel. Just plug the Panel cabling into the centre front 2 pin connector. MAKE SURE THE POLARITY IS CORRECT OR YOU WILL DESTROY THE UNIT. The polarity is marked on the front of the Arsilicii box.



Note the later RAST5 connectors on the latest unit above.


DON'T LEAVE EHU CONNECTED WHILE IN LONG TERM STORAGE 

That is not just our advice. Arcillisi were asked their view on long term battery charging, here is the reply from ArSilicii Technical :

"If you have the motorhome parked, we suggest to not connect the 220V continuously".


We suggest you connect it to the mains supply once every 3 weeks for about 2 - 3 days. See our "EHU Full Time - Yes or No" page for the reasons why.



 

For more information on how to contact us use the Contact Us page.

 

 

 

Pictures and Guidance on the various Arsilicii systems : 


Arsilicii AL120 operation and wiring notes.pdf Arsilicii AL120 operation and wiring notes.pdf
Size : 161.954 Kb
Type : pdf
Arsilicii AL320 architecture instructions.pdf Arsilicii AL320 architecture instructions.pdf
Size : 872.27 Kb
Type : pdf

A Arsillici V3 Fuse Board.